diff --git a/huesdk/discover.py b/huesdk/discover.py
index 3cf9fd6..b42afd8 100644
--- a/huesdk/discover.py
+++ b/huesdk/discover.py
@@ -27,6 +27,8 @@ def find_hue_bridge(self):
         return json.dumps(result, indent=4)
 
     def find_hue_bridge_mdns(self, timeout=5):
+        global mdns_bridges
+        mdns_bridges = []
         zeroconf = Zeroconf()
         listener = mDNSListener()
         # search for bridges